Bearing



Nov. 25, 1924. 1,517,060

B. M. W. HANsoN BEARING Filed July 1o, 1919 INVENTOR. Bew/gf M Vul-lawson:

. m ATTORNEY.

application mea my 1a,

To all whom it may concern:

` Be it known that I, BENGT M. W. HANsoN, a citizen of the United States, residing at Hartford, in the county of-.Hartford, State of Connecticut, have invented certain new'. and useful Improvements in a Bearing, of which the followingy is a specification.

It has long been recognized that various rotating parts of machinerysuch'as, for instance, thespindle of a milling machine can vvery advantageously be carried on ball bearings; that yin some instances the eiiiciency of the bearings is soon impaired because of wear between the parts 'or injury thereto due to shocks or unusual strains, and

'that in some cases conditions exist which make the use of ball bearings impractical.

It is the object of the prese-nt invention to overcome the difficulties heretofore present, under certain conditions, in the use of ball bearings and to this end'I provide an improved' structure wherein the bearin are always kept in proper operating con ition, the wear between the parts being taken up so that the-rotating member or tool may run true and there will be no chattering or grinding of the rotating member, and also wherein the bearings are protected against unusualshocks or strains which may occur such, for instance, as when a tool is positioned in or removed from the spindle.

In the accompanying drawings, I have shown but one embodiment of my invention but it is to be understood that the present disclosure is by way of illustration only and is not to be taken as restrictive of my conception. V`While-I have shown my improvements incorporated in a structure of which a tool spindle forms a part,

it is evident that my invention is applicable to various uses to which ball bearings are generally applied.

In describing the invention herein illustrated, the conventional terms will be used but it is to be understood that they are used solely for the purpose of description and they are not to be taken as having any limiting effect.

lIn the accompanying drawings:

Fig. 1 is a central vertical section of a bearingconstructed in accordance with the present invention.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1, and

Fig. 3 is an enlarged detail showing the adjustment of the bearing. l

1919. Serial No. 309,961.

In the embodiment illustrated in the drawlngs, the rotary or bearing supported member comprises a spindle 1 having, prefer-ably formed integral therewith, a pinion 2 by which it is driven from any suitable gear connection, which is not here'shown. The

forward endv of the s indle has a tool receiving socket 3 tapere as shown so as to receive the stem of the tool (not shown) and the spindle has a longitudinal bore through aol which a bar may be passed when necessary to drive out the tool. At either end of the spindle are mounted the ball bearings 4, 5, the inner rings 6, 7 of which come up against the shoulders 8, 9, the inner rings 6 being heldin position by the spindle nose cap 10 which is forced onto the end ofthe spindle, and the inner ring 7 by the thrust collarll which is keyed to the spindle and thus the inner rings are maintained in fixed spaced relation on the spindle and move therewith.

One of the rings of each bearing h-as a sliding lit relative to its suitable supporting member and while, in the presentmstance, the outer rings are slidably mounted within the supporting members, 'it is to be understood that the parts may be rearranged withou't involving a different principle of operation of the bearings. In the present, instance, the bearing supporting members comprise collars 12, 13 which may be carried at the opposite ends of the housing 14 and, if desired, they may be formed integral therewith, as shown in the drawings; The

outer ring y15 of the bearing 4, in the present case, has a close sliding fit in the bore of the collar 1.2 at what may be termed the front end of the housing and the outer ring 16v of the bearing 5 has a sliding lit in a corresponding bore of the collar 13 so that these outer rings are free to float longitudinally of thel housing.

Between the outerI rings 12 and 13 of the bearings are interposed one or more instrumentalities which tend t'o urge these rings apart. Two such instrumentalities are shown in the drawing and they comprise plunger rods 17, 17 which may have heads 18, 18 at one end slidably supported in guideways 19, 19 consisting of openings extending longitudinally of the `collar 12 and opening into the bore of the-'collar so that the heads engage or abut against the outer ring 15.

The collar 13 has guideways 20,20 in which are slidably supported plunger sleeves 21, 21 which engage the outer ring v the plunger sleeves 21 are compression springs 22, the normal tendency of which is to forcey the outer bearing rings 15 and v 16 in oppositeA directions longitudinally of 10,

the spindle. By reference to Fig. 3, it will be seen that the compression springs normally urge the sliding or outer ring of each bearlng longitudinallyvof its inner cooperatin rlng and the result of this action will be take up any wear which may occur in the bearings and always hold them in proper association` so that there is no play or looseness between the balls and the rings between which they aremounted.

The ends of. the housing are closed by plates'23, 23 which may be secured in position. by anyv suitable means such, for instance, as by the indicated screws 24. Atthe yrear end of the housing, a thrust washer 25 is provided which, together with the thrust collar lland a thrust nut 26 securing the lmembers in position, provides a plain thrust bearing.'

' Zhen the spindle is subjected to endwise shock, all parts' of the ball bearings 4, 5

'move 'with the s indle and since'the oute'r rings 15, 16 are ree to float endwise within the housing, the bearings are relieved from the burden of any suchshock.

In accordance with the provisions of the patent statutes, I have described the princi le of operation of my invention together with the apparatus which I now consider to represent-.the best embodiment thereof, but I desire to have it understood that the apparatus shown-is only illustrative and my invention is susceptible of various modifications and changes.

I claim as my invention 1. In a device of the character described,

al rotating member, a housin within which said member is mounted an having bores yat its opposite ends, ball bearings within ,sa-id bores and within which said rotating member is supported, the inner rings of said bearings being secured to said rotating member aga-inst endwise movement thereaflong and the outer rings of said bearings being slidably supported within said bores, a plunger having ahead mounted within the guideway of one of said bores and engaging the outerl ring of one of said bearings, a sleeve in the guideway of the other of said bores and engaging the outer ring of the other bearing, and a s ring between said head and sleeve urging t 1e same" apart.

y3. In a device of the character described, a housing, a. indle therein, a pair of ball bearingunits mterposed between said spindie and said housing, each of said units including an inner ringfixed tothe spindle. an outer ring slidably supported by and longitudinally movable of said housing and interposed bearings between the inner and outer rings, spring actuated means common toboth of said outer bearing rings for simultaneously urging the same apait. and a thrust bearing for limiting the longitudinal movement of said spindle relative to thehousing.

BENGT M. W. HANSON. 

